Summary

• Add documentation for shared_ptr with No-op Deleter pattern to singleton guidelines
• This completes the remaining acceptance criteria from issue docs: establish singleton and static object guidelines for SDOF prevention #202

Changes

English Documentation (SINGLETON_GUIDELINES.md)

• Added new section "3. shared_ptr with No-op Deleter Pattern"
• Included code examples and use cases
• Added real-world example from GlobalLoggerRegistry
• Updated summary table with new pattern
• Updated version to 1.1.0

Korean Documentation (SINGLETON_GUIDELINES_KO.md)

• Added corresponding Korean translation
• Updated summary table and version history

Acceptance Criteria Status (Issue #202)

• Create SINGLETON_GUIDELINES.md in common_system (done in docs: establish singleton pattern guidelines for SDOF prevention #198)
• Document Intentional Leak pattern with code examples (done in docs: establish singleton pattern guidelines for SDOF prevention #198)
• Document when to use Meyer's Singleton vs Intentional Leak (done in docs: establish singleton pattern guidelines for SDOF prevention #198)
• Add shared_ptr no-op deleter pattern documentation (this PR)
• Reference from thread_system and network_system READMEs (separate repos)
• Optional: Provide template implementations (existing in GlobalLoggerRegistry)

Test Plan

• Verify markdown renders correctly
• Verify code examples compile (based on existing GlobalLoggerRegistry implementation)
• Verify both EN/KO versions are consistent

Closes #202